71717385956 has 6 divisors (see below), whose sum is σ = 125505425430. Its totient is φ = 35858692976.

The previous prime is 71717385947. The next prime is 71717385977. The reversal of 71717385956 is 65958371717.

It can be written as a sum of positive squares in only one way, i.e., 39933627556 + 31783758400 = 199834^2 + 178280^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71717385895 and 71717385904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8964673241 + ... + 8964673248.

It is an arithmetic number, because the mean of its divisors is an integer number (20917570905).

Almost surely, 2^71717385956 is an apocalyptic number.

It is an amenable number.

71717385956 is a deficient number, since it is larger than the sum of its proper divisors (53788039474).

71717385956 is a wasteful number, since it uses less digits than its factorization.

71717385956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17929346493 (or 17929346491 counting only the distinct ones).

The product of its digits is 11113200, while the sum is 59.

The spelling of 71717385956 in words is "seventy-one billion, seven hundred seventeen million, three hundred eighty-five thousand, nine hundred fifty-six".